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7 August, 16:31

What mineral composition is most characteristic of intermediate rocks?

a. olivine, pyroxene, and calcium-rich plagioclase

b. orthoclase, quartz, and biotite

c. sodium-rich plagioclase and hornblende with some quartz or biotite

d. particles of volcanic ash welded together

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  1. 7 August, 20:19
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    D. particles of volcanic ash
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